Gas sensor array temperature modulation

A chemical detection platform composed of 14 temperature-modulated metal oxide semiconductor (MOX) gas sensors was continuously exposed during 3 weeks to dynamic mixtures of carbon monoxide (CO) and humid synthetic air in a gas chamber. The utilized sensors are commercially available by Figaro Engineering (7 units of TGS 3870-A04) and FIS (7 units of SB-500-12). The heater voltage of the sensors is modulated in the range 0.2-0.9 V in cycles of 20 and 25 s, following manufacturer recommendations.

The acquired time series of the sensors and the measured values of CO concentration, humidity and temperature inside the gas chamber are provided.

Each experiment consists on 100 measurements: 10 experimental concentrations uniformly distributed in the range 0-20 ppm and 10 replicates per concentration.
Each replicate has a relative humidity randomly chosen from a uniform distribution between 15% and 75% r.h.
A single experiment lasts 25 hours (100 samples x 15 minutes/sample) and was replicated on 13 working days spanning a natural period of 17 days.

##Attribute Information##

The dataset is presented in 13 text files, where each file corresponds to a different measurement day. The filenames indicate the timestamp (yyyymmdd_HHMMSS) of the start of the measurements.
Each file includes the acquired time series, presented in 20 columns: Time (s), CO concentration (ppm), Humidity (%r.h.), Temperature (ºC), Flow rate (mL/min), Heater voltage (V), and the resistance of the 14 gas sensors: R1 (MOhm),R2 (MOhm),R3 (MOhm),R4 (MOhm),R5 (MOhm),R6 (MOhm),R7 (MOhm),R8 (MOhm),R9 (MOhm),R10 (MOhm),R11 (MOhm),R12 (MOhm),R13 (MOhm),R14 (MOhm)
Resistance values R1-R7 correspond to FIGARO TGS 3870 A-04 sensors, whereas R8-R14 correspond to FIS SB-500-12 units.

##Relevant Papers##

The description of the experimental setup and chemical detection platform can be found in [1-2]. The dataset has been used also in [3].

[1] Burgués, Javier, Juan Manuel Jiménez-Soto, and Santiago Marco. "Estimation of the limit of detection in semiconductor gas sensors through linearized calibration models." Analytica chimica acta 1013 (2018): 13-25.

[2] Burgués, Javier, and Santiago Marco. "Multivariate estimation of the limit of detection by orthogonal partial least squares in temperature-modulated MOX sensors." Analytica chimica acta 1019 (2018): 49-64.

[3] Fernandez, Luis, Jia Yan, Jordi Fonollosa, Javier Burgués, Agustin Gutierrez, and Santiago Marco. "A practical method to estimate the resolving power of a chemical sensor array: application to feature selection." Frontiers in chemistry 6 (2018).

##Citation Request##

Citing references [1] and [2] is requested if you use the dataset.

##Donors of the Dataset##

- Javier Burgués (jburgues '@'ibecbarcelona.eu, jburgues8 '@'gmail.com)
- Santiago Marco (smarco '@'ibecbarcelona.eu)

一种由14个温度调制的金属氧化物半导体（MOX）气体传感器组成的化学检测平台，在3周的时间内持续暴露于气室中动态混合的一氧化碳（CO）和潮湿合成空气中。所使用的传感器由Figaro Engineering（TGS 3870-A04型号，7个单元）和FIS（SB-500-12型号，7个单元）商业提供。传感器的加热电压在0.2-0.9 V的范围内进行20秒和25秒的周期性调制，遵循制造商的建议。获取的传感器时间序列和气室内的CO浓度、湿度和温度的测量值一并提供。每个实验包含100次测量：10个均匀分布在0-20 ppm范围内的实验浓度，以及每个浓度10个重复。每个重复的相对湿度从15%至75%的均匀分布中随机选择。单个实验持续25小时（100个样本乘以每个样本15分钟），并在17天的自然周期内重复了13个工作日。

##属性信息##
该数据集以13个文本文件的形式呈现，每个文件对应不同的测量日。文件名指示了测量的开始时间戳（yyyymmdd_HHMMSS）。每个文件包括获取的时间序列，以20列呈现：时间（秒）、CO浓度（ppm）、湿度（%r.h.）、温度（ºC）、流速（mL/min）、加热电压（V）以及14个气体传感器的电阻值：R1（MOhm）、R2（MOhm）、R3（MOhm）、R4（MOhm）、R5（MOhm）、R6（MOhm）、R7（MOhm）、R8（MOhm）、R9（MOhm）、R10（MOhm）、R11（MOhm）、R12（MOhm）、R13（MOhm）、R14（MOhm）。电阻值R1-R7对应于FIGARO TGS 3870 A-04传感器，而R8-R14对应于FIS SB-500-12单元。

##相关论文##
有关实验装置和化学检测平台的描述可在[1-2]中找到。该数据集亦被用于[3]。

[1] Burgués, Javier, Juan Manuel Jiménez-Soto, 和 Santiago Marco. "Estimation of the limit of detection in semiconductor gas sensors through linearized calibration models.